¹H NMR (400 MHz, CDCl₃) δ 7.82 (t, J = 1.6 Hz, 1H), 7.63 – 7.57 (m, 2H), 7.52 (dd, J = 8.5, 6.6 Hz, 1H), 7.32 (s, 4H), 7.07 (s, 2H), 2.45 (s, 12H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 141.88, 141.29, 138.23, 128.96, 128.90, 126.16, 125.97, 125.17, 21.40 m/z (GC-MS): 286。